I have an Inspiron N5010 running Ubuntu13.10 64b. It uses Intal HD Graphics (i.e. no ATI/Nvidia graphics card)
I need a software that uses OpenGL, and I installed multiple packages using synaptic that had the word "opengl"
Now, system boots up fne, but I only get a blank screen when I login (I can see and move the mouse pointer). Closing the laptop lid, or pressing Ctrl+Alt+L gives me the usual lock screen w/o any problems.
After opening tty1, I ran startx which again switched to a black screen. Going back to tty1, I saw startx was stuck at Loading Extension GLX. Used Ctrl+C to close it
After googling, I tried
sudo apt-get reinstall ubuntu-desktop sudo apt-get unity
but it did not help
Any ideas on what I should do now?